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04-22-2014, 11:16 AM | #1 | |
AF Regular
Join Date: Sep 2007
Location: Mountain View, Wyoming
Posts: 110
Thanks: 13
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O2 sensor replacement
I am wondering when I get the PO171 and PO174 )2 sensor code. How do you know which of the four O2 sensors need to be changed. Do you start with the upper ones?
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05-02-2014, 06:42 AM | #2 | |
AF Enthusiast
Join Date: Sep 2006
Location: Athens, Georgia
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Re: O2 sensor replacement
The codes indicate your running lean. I would check fuel pressure, air leaks gaskets at manifold exhaust leaks. Do this before working on sensors.
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12-19-2014, 11:37 PM | #3 | |
AF Regular
Thread starter
Join Date: Sep 2007
Location: Mountain View, Wyoming
Posts: 110
Thanks: 13
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Re: O2 sensor replacement
I believe this all started with a badly cracked intake air tube. I replace it and the O2 sensors bank 1 and 2 sensors 1 and the codes cleared. I had no air leaks there has been no loss of coolant. I repaired it with the help of code connect on my new uscan reader. Thanks for the input.
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